If you're ever curious about the exact number of people who are in space right now, the single-serving site aptly named how many people are in space right now? will tell you.
The answer is 6. The lucky 6 who are currently living every kid's dream? Americans Chris Cassidy and Karen Nyberg, Russians Pavel Vinogradov, Alexander Misurkin and Fyodor Yurchikhin and Italian Luca Parmitano. Three of them have been up there 91 days, the other three 152 days.
As a guy who is sometimes reasonable, 6 seems to be an efficient number given the, well, space constraints and all that. But as a guy whose brain is still half-child, 6 seems much too low for 2013.